Asked if Ozzy is currently capable of remembering all the albums he recorded over the years, Zakk replied:
“Whenever he talks about all the albums he’s done, he always says, whether what album had more success than the other one, he goes, ‘I always remember each album whether I had a good time making that record or I was miserable.’
“I’ll say ‘Oz, I thought this record was really great.’ He goes ‘Yeah, I couldn’t stand that record just because I was miserable when we were making that record.’ Or with the first two [Ozzy solo albums] or Sabbath records, he was, like, ‘Dude, that album was so much fun when we made that one. This was going on and that.’
“Between the drugs, the booze… Oz, when he made the Black Sabbath [self-titled debut], his vocal performance on that record, I’ll put it up against any of his peers or anybody for that matter, in the rock genre.
“I said, ‘Oz, were you, like, taking vocal lessons with Pavarotti and eating your Wheaties every day?’ He goes, ‘No. Just lots of drugs, Zakk. Lots of drugs.’ I go, ‘Let’s not forget the booze.’ He goes ‘Oh, never. Never forget that.'”